UK workers put in £28.5 billion in unpaid overtime in 2025, the TUC has said in a new analysis, describing this as “a modest improvement” from 2024 when the figure was closer to £31 billion. Workers who do unpaid overtime miss out on 6.8 hours of their own time a week for the benefit of their employer, the TUC stated, calculating that in the course of a year, this amounts to a loss of £8,100 for the average person doing unpaid overtime work.